#mammals

Source: Hrald — CC BY-SA 3.0, Wikimedia Commons The European Hedgehog: The Art of Hibernation As the nights grow cold in autumn, the European hedgehog prepares for one of the most dramatic physiological

Source: Böhringer Friedrich — CC BY-SA 3.0 at, Wikimedia Commons The Alpine Marmot: Six Months of Sleep in the Mountains High above the tree line in the Alps, the alpine marmot lives in a world where summer